Britain's Merton Park Productions briefly put its Edgar Wallace series on the back burner for the 1965 sci-fier Invasion. Per its title, the film involves a massive invasion of earth by extraterrestrials. Keeping within its tight budget, the film depicts only a handful of the invaders, who are fended off by the staff of a small hospital. Head doctor Edward Judd, who is caring for an imprisoned alien, decides to protect his patient from the invaders, who plan to kill the prisoner before he can betray them. Armed with little more than his wits, Judd saves himself and his charge. ~ Hal Erickson, Rovi